Which 4" backing plate to buy for the PC?

[300B]

With the backing plate being this small I don't know if flexibilty matters or not.



The 4" stiffer one

4" Porter Cable Pad Holder



or



The 3.5" Flexiplate

3.5^^ Hook & Loop Flexiplate

 

[BigJimZ28]

I use one like the flexiplate



it's hard to tell but is the other one actualy a 4" BP?

if so I would not use it with 4"pads